linux-kernel - Re: [linux-usb-devel] [BUG] USB

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Message-ID: <Pine.LNX.4.44L0.0711261713280.14778-100000@netrider.rowland.org>
Date:	Mon, 26 Nov 2007 17:17:51 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Raymano Garibaldi <raymano@...nos.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	USB development list <linux-usb-devel@...ts.sourceforge.net>
Subject: Re: [linux-usb-devel] [BUG] USB_PERSIST

On Mon, 26 Nov 2007, Raymano Garibaldi wrote:

> > Wait a minute.  You're saying that  USB Persist worked under 2.6.21
> > because it wasn't available?  That makes no sense.  Besides, if you
> > don't like USB Persist under 2.6.23, you can always eliminate it by
> > turning off CONFIG_USB_PERSIST.
> >
> 
> I have tried this. Simply turning off CONFIG_USB_PERSIST doesn't work.
> In this case the USB drive file system is unmounted on resume, even if
> the drive remained plugged in during suspend.

Something about this doesn't sound right.

When you have CONFIG_USB_PERSIST enabled, do you remember to turn on 
the Persist feature for the root fs device by writing a "1" to the 
device's power/persist file in sysfs?

Can you try building a kernel with CONFIG_USB_PERSIST and 
CONFIG_USB_DEBUG both enabled, and post the dmesg log from immediately 
after resuming?

Alan Stern

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